Glossary of Judo terminology
Kari ashi (Foot sweep)
"Kari-ashi" (Foot sweep) is an Ashi waza (Foot / Leg techniques) in which the opponent is toppled by reaping his foot. The Kari-ashi (Foot sweep) is used effectively in the following Waza: Osoto-gari (Large outer reap), Ouchi-gari (Large inner reap), Kosoto-gari (Small outer reap), Kouchi-gari (Small inner reap).
The Osoto-gari (Large outer reap) consists of destabilizing the opponent in the backward direction, and then toppling him by reaping his leg with a large reaping motion from behind. This is effectively accomplished by applying a strong reaping motion to the back of the knee which supports his Center of gravity, followed by lifting that leg high so that the sole of the foot faces the ceiling.
The Kouchi-gari (Small inner reap) consists of using the arch of the reaping foot to scoop up the opponent's foot the moment he begins to shift his center of gravity to that leg.